Question

ПОМОГИТЕ ПЛЗ)15 баллов номер 13

Answer 1

x+21/(x-2)=-8
D(y): x-2≠0, x≠2
x+21/(x-2)=-8/*(x-2)
x(x-2)+21=-8(x-2)
x²-2x+21=-8x+16
x²+6x+5=0
a-b+c=0 (1-6+5=0) → x₁=-1, x₂=-5